Combination jack and shock absorber for automobiles



J. M PAUL.

Jan. 23, 1923,

Comm/mom JACK AND SHOCK ABSORBER 50R AUTOMOBILES.

FILED 02016.1921.

Rssmvom implication tiled ilecembcr 16, 19%..

T all whom may concern:

Be it known that l, Juno's M. PAUL, a citizen of the United States,residing. at Duluth, in the county oi? Louis and State of Minnesota,have invented certain new and useful improvements in Combination Jacksand Shock Absorbers for Auto mobiles, of which the following is aspecification, re't'erence being bad therein to the accompanyingdrawing.

This invention relates to automobile at tachments and has specialreference to a combination jack and shock. absorber.

The principal object is to produce a novel combination of this characterwhich nutty be conveniently employed in the jacking up of the automobilein its entirety or any one of the wheels thereof individually and at thesame time provide adequate, shock absorl inp; means cooperativetherewith.

Other objects and advantages will appear in the lurther description ofthe invention.

Referring to the accoi'npanying drawing forming part of? thisapplication in which like reference characters indicate like parts:

Figure l is diagrammatic illustration of one of the combination jack andabsorbing devices, and

Figure 2 is an enlarged, broken, central, vertical, sectional viewthrough one of the combination and absorbing cylinders.

i represents the axle of an automobile and 2 one of the wheels thereof,and, firmly secured in any desired manner to" the axles oi theautomobile, one adjacent each wheel thereof. are the vertically disposedc0nibination jack and absorbing? cylinders 10, only one oi which and thevalve operatingn'icchauisni therefor is shown in the drawing.

4. Represents a fraginental portion of the body of the automobile whichis supported upon springs in the usual manner, and the reciprocal motionof which it is desirable to retard, as by a shock absorber.

l shall now proceed to describe the construction and operation of one ofthe norm bination cylinders and cooperative parts, it being understood,as iireviously stated, that there is one of the combination jacks ateach corner of thecar', there being a common pump 5 and reservoir 6, thefeed pipe to the pump from the reservoir being illustrated at 7, thereturn pipe tothe reservoir from the combination cylinder, being indicated at 8, and the feed pipe to the com ilorial Ito stance.

bination cylinder from the pump is illustrated at 9.

represents the combination jack and shock absorber cylinder which iselongated vertically, and carries therewithin the reciprocal piston 11,the latter also being in the form of a hollow cylinder, the interior orwhich carries the reciprocal shock absorbing piston 12v The jack piston11 is smaller in dian'ieter than the interior of the cylinder 10 andcarries at its upper end an annular enlargement 13 in which is mounted asuitable packing ring 14: to result in a tight connection between thejacking piston and the cylinder 10 A bushing or sleeve 15 is insertedwithin the lower end of the cylinder l0 and surrounds the jacking piston11 making a suitable guide therefor which may carry any form of suitablepacking to prevent leakage, and a cap 16 is shown as screw threadedlymounted externally oi the lower end of the cylider 10 for holding thebushing in place.

Within the upper end of the cylinder 10 is screw threadedly mounted theplug 17 the upper end of which is somewhat reduced in diameter andcarries externally screw threaded thereupon the cap 18, Within the plug17 is carried a sleeve 10, similar to the sleeve 15, and any desiredform of packing such as illustrated at 20 may be employed for forming atight joint about the piston rod 21 of the piston 12. The piston 12 hasformed theretlurough vertically a plurality of holes 22, they'being'for'the escape of the fluid, which I prefer shall be oil. so as togovern the reciprocal motion or the pisston as it is raisedand loweredby the movement of the body of the car. The upper end of the piston rod21 is pivotally attached in any desired manner, as at 23, to the body 4;of the car, and thus when the cylinder 10 is full of oil and the piston11 in its uppermost position the motion of the body l of the vehiclewill be retarded by the sluggist motion of the piston rod 21 due to itsclnirning 'eil'ect in the oil in the hollow piston 11. a

The pipe connections to the piston 10 are illustrated at 9A- and 525,the latter being adjacent the lower'end of the cylinder'and thetormeradjacent the upper end. The inner taco of the plug 17 is recessedas at'26 and within this recess is mounted a flat expansive spring 27,.This spring is for the lltl purpose of engaging the upper end of the ackpiston 11 when it is forced upwardly thereagainst, and the pipeconnection at is so spaced below the'inner face of the plug 1? as topermit of the enlargement of the ring 13 on the jack piston to slightlypass the entrance of said pipe connection when liquid is being forcedinto the cylinder 10 below said ring or enlargement for the purpose ofraising the jack piston to its uppermost position. When this occurs thespring 27 will be compressed and such escape of liquid through the pipe24 may continue so long. as the pump is in operation, thus preventingany possibility of damaging any part of the mechanism provided the pumpis not stopped at the proper time. Then when the pump is stopped, theaction of the spring 27 Will tend to depress the jack piston slightlyclosing the escape through the pipe 2 land allowing the jack piston to'remain in such position, When the pump is again started and the controlvalve, which will be described later, so adjusted as to admit the liquidthrough the pipe 24 it will be discharged into the cylinder above thejack piston 11 forcing it downwardly until the latter engages the groundor block provided for the purpose, when a continued action of the pumpwill raise that portion of the vehicle as is obvious, and it isimmaterial as to the relative position of the pistons 11 and 12 forduring such time as when the jacl: is

being employed as such the shock absorbing means is not required.

The pump 5 may be of any desired construction and operated andcontrolled as for examlple electrically, though this feature does notform part of my present invention. However the controlling device forthe passage oi: the liquid to and from each cylinder 10 comprises anovel form of valve arrangement, the body portion of which isillustrated at 28, within which are located two spaced rotative port orpassage controlling members or spigots 29 and 30. These members arerotated simultaneously by any desired form of mechanism such as gearingcontrolled by a central hand operated shaft or stem 31, the gear ofwhich is diagrammatically suggested at 32. Each spigot'Qii and 30 hasformed diametrically there through a passageway 33, and, to one side ofthis passageway, is an arcuately shaped passageway il l in each spigot.These passageways are so arranged that when the diametrical one in onespigot is communicating with the force feed pipe 9, the pans sageway 33in the other spigot will be shut oil from any communication with thecirculating system, though the arcuutcly shaped passageway 34 in thelast mentioned spigot will be in communication with the reservoir ipeline 8. In the, illustration shown in igure 1 of the drawing 1 haveshown the spiggit 29 opening the communication between the force feedpipe i) from the pump. and the pipe 25 leading to the lowermost end ofthe cylinder ll) in which position. if the pump is operated the jackpiston in will remain in its uppermost position as for example when the:rnloumbilc is in ordinary service, andnt which time the shock ubsorling mechanism is in operative position as previously described.

Now should it become desirable to raise the wheel from the ground byjacking up that corner of: the car valve control stem ill may be turnedso as to rotate the spigol's with the passageways therein to theposition shown in dotted lines in Figure 1 when the communication willbe open through the spigot 30 between the force feed pipe 5) from thepump and the supply pipe 2i to the cylinder 10. Then it the pump startedthe liquid will be forced into the cylinder l0 crowding the jackingpiston lr'l downwardly to its lowermost 0 any intermediate desiredposition and at which time the liquid below the annular piston ring 13and within the cylinder 10 will be forced outwardly through the pipe andthe arcualiely shaped pussageway at in the spigot 29 and through thepipe 8 to the reservoir (5.

No provision is made for the initial up ward return Inotion of the jackpiston as it is quite obvious that since the controlling: valve isoperated so as to permit ol the escape of the liquid under pressurewhich is holding the vehicle jackcd up, the weight thereof will causethe jacking piston to raise sufiiciently above the entrance of thesupply pipe 25, connected to the cylinder 10, to provide the properconnnunioation therewith for forcibly raising said jacking piston.

It is to be understood that tlyere is to be provided a valve controlarrangement such just described for each one of the cylinders 10, sothat any one of them, or all, may be operated as desired, and the pumpcon trolled independently thereof.

Having thus described my invention, what I claim and desire to secure byLetters Patent. is: Y

1. A device of the character described for vehicles comprising anupright cylinder rigidly carried on the axle of the vehicle, means forsupplying liquid under pressure to both ends of the cylinder. and ajacking; piston within the cylinder rcciprocable in either direction bythe action of the liquid. 2. A combined jack and shock nbsmrbcr forvehicles comprising an upright cylinder rigidly carried on the axle ofthe vehicle, means for supplying liquid under pressure to both ends ofthe cylinder, a. hollow jacking piston within the 'llll(l(.lrcciprocnble in either direction by the action of the liquid, meanswhereby the jackiznij o liiO nm'lmally remains full 0% the liquid and ashack absorbing" piemn epevrebie Within file jacking piston permanentlyeti'eehed to em frame ofthe vehicle above the axle sub-- 0 stmmially asand fee the purpose described. 3.,A combined jack and shock absorber forvehicles eemprising :11, eeopel'atively combined fielescopie jacking andeheek absorbing cylinder adjacent 0m 01' more wheel's 0K 20 the vehicle,means fez supplying iiquid un-- (1e); pressure to both ends of thecylinder 2L double enmml'valve fer the liquid supply to'eech cylinderwhereby to optionally cause the device 930 fm'lir'tien'us e jack or as ashock absm'imr. I 5

in testimony whereof I hereunto affix my signuturein the presence of twowitnesses.

JULIUS M. PAUL.

. Witnesses:

S. U. Bummer, S. G150. bmvemm.

